Hydraulic engine built in alpha siphon piping



March 5, 1929. zo 39 1,704,417

HYDRAULIC ENGINE BUILT IN A SIPBON PIPING Filod an. :5, 92a

//We ntor: (we 64 i.

Patented Mar. 5, 1929.

UNITED STATES KARL ZOLL, 3D, 01 HATZFELD, EDER, GERMANY.

HYDRAULIC ENGINE BUILT IN A SIPHON PIPING.

Application filed February 3, 1928, Serial 1T0. 251,574, and in Germany February 21, 192 7.

This invention relates to hydraulic engines built in a siphon piping.

Difliculties result from the condition that the siphon piping must be ke t free from air. On the one hand, it is di cult to prevent that air is drawn by the flowing water into the siphon piping. On the other hand air filters into the piping after a short time of service, specially through the packing of the shaft bearing, as it is impossible to prevent wear in this bearing.

According to the invention these inconveniences are obviated by making the engine shaft of the hydraulic engine project outwards only under the water-level of the siphon and further by arranging injection pipes and air collecting spaces, communicat ing with the atmosphere, at such points at which separation of air might be produced owing to the lackin of speed.

An embodiment o the invention is illustrated, by way of example, in the only figure of the accompanying drawing.

In the drawing 1 designates the upper water level and 2 the lower water level. These two water levels are connected by a siphon piping system which consists of a supply pipe 24, 25 having a shutting off slide valve 3, the rising portion 25 of said piping being adapted to be lengthened to about 10 ms. and ending at 4 in a casing 5, in which the hydraulic engine 6 is located. This casing 5 is air-tightly closed and extends to below the water level 2. Between the two water levels 1, 2 there is no open space in this casing 5 through which air might flow into the same when certain ele ments get worn during the service. A waterstand pipe 7 serves only for observing the space 8 containing'rarified air and this stand pipe is packed by means of cocks which are not exposed to real wear. The bearing 9 and the bearing for the shaft 10 are, however, arranged in the casing 5 in such a manner that they do not roject through the wall of the casing. The hearing 12 through which the power shaft 11 projects from the casing 5 is situated underneath the water level 2 so that at this point, even when the bearing is worn, only water can flow through this bearing, but no air can penetrate into the casing 5. The shaft 11 transmits to the counter shaft 14 and the belt pulley 15 through the intermediary of bevel gears 13. The portion 16 of the'bottom plate of the casing 5, near the point at which the shaft 11 projects through the bearing 12, even when it should not be perpendicular to the vertical walls of the casing 5, forms a baffle surface for the water, which causes the air to separate. This air would then rise in the shape of small bubbles into the space 8 of the hydraulic engine 6 filled with rarified alr, and the water would be gradually pressed out of the siphon pipe. To prevent this the siphon pipe-casing 5 has a funnel shaped paitition 17, the central opening of which increases the velocity of the water and prevents the entering of air bubbles. An air collecting space 18 is further formed underneath the partition 17, which either communicates directly with the atmosphere,

so that the air can escape from this space, or which is connected with the discharge pipe 20 in such a manner, that the cross section of this discharge pipe 20 is only partly filled by the water, a free cross section for air being left above the water.

There is no objection to make the discharge cross section for the water injectorlike, so that quantities of separated air are automatically sucked off.

The operation of the arrangement is as follows:

By closing the side-valves 3 and 21 the whole siphon-piping-system is filled with water through the tubular sup ly 22, the cook 23 for the outflow of air elng open. As soon as the water has risen to this aircock 23, the air-cock has to be closed and the slide-valves 3 and 21 have tobe opened. When the water is flowing out through the slide-valve 21, water is forced by the pres sure of the atmospheric air through the piping 24, 25 and 4 into the casing 5, so that it operates the hydraulic-engine 6 and flows into the Water-space 26. The efiiciency of gine therein, a shaft for said hydraulic en- 10 the engine may be regulated accordingly by glue pro ect1ng from said caslng underneath means of the slide-Valve 3. the Water levels of the siphon and a funnel- The engine might also be started by suckshaped partition in said casing above the 5 ing off the air or by similar means. bottom plate of the same defining a space I claim connected with the atmosphere and serving 15 A siphon piping With hydraulic engine as collector. built in, comprising in combination with the In testimony whereof I afiix my signature. casing of the siphon piping a hydraulic en- KARL ZOLL, III. 

